CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Bo Yu,Yuxuan Wu,Fanming Meng,Qian Wang,Xueqiang Jia,Muhammad Wasim Khan,Caimei Huang,Shuyi Zhang,Li Yang,Hao Wu
Employing photocatalytic technology to promote CO 2 photoreduction into carbon fuels is of great significance to the field of renewable energy. Herein, the hierarchical Bi 2 MoO 6 @In 2 S 3 heterostructured nanotubes rich in surface oxygen vacancies (SOVs) are synthesized by a multi-step control strategy for visible-light-driven CO 2 reduction. The combination of density functional theory (DFT) calculations and in-situ X-ray photoelectron spectroscopy (ISI-XPS) confirms the existence of the S-scheme charge transfer mechanism and SOVs, which will accelerate the separation of charges and ameliorate the redox capability. Additionally, the unique hierarchical hollow architectures also effectively promote the efficiency of light utilization and provide abundant reactive sites. Consequently, the optimized Bi 2 MoO 6 -SOVs@In 2 S 3 heterogeneous nanotubes display remarkable activity under visible light irradiation, with the yield rate and selectivity for CO-generation are 28.54 μmol g -1 h −1 and 94.1%, respectively. This work provides new opportunities for the design of hierarchical hollow heterojunctions with an S-scheme charge transfer mechanism for effective photocatalytic CO 2 reduction.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
Materials Today Sustainability
·
2022
·
IF 7.244
Haipeng Sun,Zhen Liu,Xingqiang Liu,Changlin Yu,Longfu Wei
In this paper, adjusting the content of conducting polymer polypyrrole (Ppy), a series of Ppy/Bi 2 MoO 6 microsphere photocatalysts were prepared. The prepared samples were characterized by some advanced physicochemical methods. These results showed that the introduction of Ppy was beneficial to the increase of crystallinity and specific surface area of Bi 2 MoO 6 . In electrochemical tests, the Ppy/Bi 2 MoO 6 microspheres photocatalyst showed the enhanced migration rate of photogenerated carriers and the improved utilization efficiency of photogenerated carriers in comparison with the pure Bi 2 MoO 6 . The Ppy/Bi 2 MoO 6 microspheres photocatalyst exhibited an excellent photocatalytic performance in the degradation of high concentration of Rhodamine B (RhB), and also could efficiently remove the mixed dyes (RhB and methyl orange). Furthermore, the capture experiments reveal that both holes (h + ) and superoxide radicals (·O 2 − ) played an important role in the removal of dyes.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jiaqi Qiu,Mingnv Guo,Zhongqing Yang,Ziqi Wang,Ruiming Fang,Jiang He,Jingyu Ran
A series of novel iodine substitution and oxygen vacancy double defects Bi 2 MoO 6 nanosheets for enhanced photocatalytic reduction of CO 2 is reported, which exhibited superior CO 2 photocatalytic activity and CH 4 selectivity under full solar spectrum illumination. Bi 2 MoO 6 -I2 (the molar ratio of I to Mo is 0.13) has the highest photocatalytic activity, its CO yield is 2.0 times that of pure Bi 2 MoO 6 , the CH 4 yield is 12.2 times that of pure Bi 2 MoO 6 , and the CH 4 selectivity reaches 5.3 times that of pure Bi 2 MoO 6 . Its structure and physicochemical properties were investigated by material characterizations, photoelectrochemical tests and DFT calculations. The enhancement in CO 2 conversion and CH 4 selectivity benefit from: (1) Larger specific surface areas and smaller nanosheets thicknesses facilitate carrier migration; (2) More suitable band structure promotes the reduction of CO 2 ; (3) Insertion of impurity energy levels in the band gap enables efficient jumping of photogenerated electrons; (4) Double defects contribute to efficient CO 2 adsorption and activation; (5) Promoting highly selective conversion of CO 2 to CH 4 by optimising the formation energy of reaction intermediates.
研究领域:
材料科学
·
环境科学
·
光催化
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Huifang Feng,Yitong Sun,Qiaozhen Xu,Hong Liu
Developing efficient photocatalyst to promote the conversion of CO 2 into value-added chemicals remains challenging. Here, novel NH 2 -MIL-101(Fe)@Bi 2 MoO 6 S-scheme heterojunctions were fabricated via a solvothermal method, in which Bi 2 MoO 6 (BMO) nanoparticles uniformly growing on the NH 2 -MIL-101(Fe) (NM101) octahedrons with intimate contact interface. The resultant heterojunctions revealed significantly enhanced activity for CO 2 photoreduction. The optimal performance was achieved when the content of BMO was 10 wt%, and the formation rate of CO reached 67.0 μmol·g −1 ·h −1 under visible light illumination (with apparent quantum efficiency of 0.09 % at 450 nm), which was 3.2-fold of individual NM101. The boosting activity benefited from the formation of S-scheme heterojunction at the NM101 @BMO interfaces, which facilitated the separation of photoinduced electron-hole pairs with strong redox ability at the interface. This S-scheme charge transfer mechanism was further validated by the in-situ XPS and fluorescence probe molecular experiment. Besides, the intermediates and preliminary mechanism of photoreaction were unraveled based on in-situ DRIFTS analysis. This work provides some novel insights for designing efficient S-scheme photocatalysts for CO 2 photoreduction.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Shilin Li,Yunhui Tian,Guangxin Zhang
In this work, a novel photocatalyst, comprising of Bi 2 MoO 6 and Bi 2 O 2 (OH)(NO 3 ), was successfully synthesized by the one-pot hydrothermal method, thereby illuminating an innovative avenue for structure modulation of Bi 2 MoO 6 . The characterizations proved the facile attainability of controllable modifications in the microstructure and morphology of Bi 2 MoO 6 . The comprehensive appraisal of the synergistic adsorption-photocatalytic performances of the composites in the context of ciprofloxacin (CIP) was carried out. The findings presented compelling evidence that the amalgamation of Bi 2 MoO 6 /Bi 2 O 2 (OH)(NO 3 ) exhibited an extraordinary adsorption capacity and photocatalytic activity when compared with the pristine Bi 2 MoO 6 and Bi 2 O 2 (OH)(NO 3 ). By virtue of its high surface area and pore volume, the optimized BMO/BON manifested a CIP adsorption capacity that surpassed that of Bi 2 MoO 6 and Bi 2 O 2 (OH)(NO 3 ) by approximately 2.4 and 11.2 times, respectively. Furthermore, through the concerted effects of adsorption and photocatalytic degradation, BMO/BON demonstrated an impressive CIP removal efficiency of 99.2 % following a mere 30 min of visible light exposure. The reaction rate constant was found to be approximately 0.124 min −1 for BMO/BON, surpassing that of Bi 2 MoO 6 and Bi 2 O 2 (OH)(NO 3 ). The augmentation in the photocatalytic activity of BMO/BON can be ascribed to its diminutive crystalline dimensions, large specific surface area, and narrowed bandgap. Thus, this investigation introduces a practical and ingenious strategy for the tuning of the Bi 2 MoO 6 structure by manipulation of reactant ratios, showcasing significant implications in the realm of catalysis.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2017
·
IF 4.364
Xiao Du,Jun Wan,Jia Jia,Chao Pan,Xiaoyun Hu,Jun Fan,Enzhou Liu
Ag 3 PO 4 -Bi 2 MoO 6 heterojunctions with visible-light photocatalytic activity were successfully fabricated via a deposition-precipitation method. The investigation shows that Ag 3 PO 4 -Bi 2 MoO 6 composites exhibit enhanced visible light harvesting ability and better degradation efficiency for RhB compared with Bi 2 MoO 6 and Ag 3 PO 4 under visible light irradiation (λ > 420 nm). What's more, we found that the activity and the stability of Ag 3 PO 4 -Bi 2 MoO 6 heterojunction could be further improved by adding of H 2 O 2 in the RhB reaction solution. The enhanced photocatalytic performance and structure stability are primarily attributed to the efficient charge carrier separation of the heterojunction formed by Ag 3 PO 4 and Bi 2 MoO 6 , and the electron capturing property of H 2 O 2 on the surface of Ag 3 PO 4 -Bi 2 MoO 6 composites, leading to a highly efficient removal of RhB using the Ag 3 PO 4 -Bi 2 MoO 6 -H 2 O 2 system. In addition, the active species trapping experiments indicate that h + and •O 2 – play important roles during the photocatalytic degradation process . This work suggests that the H 2 O 2 assisted Ag 3 PO 4 -Bi 2 MoO 6 heterojunction system could be a potential promising photocatalyst for environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 10
·5433-5440
·
IF 2.936
Chol-Nam Ri,Song-Gol Kim,Kyong-Sik Ju,Hyok-Su Ryo,Chol-Ho Mun,U-Hyon Kim
A novel Bi2MoO6/Bi4V2O11 heterostructured photocatalyst was successfully fabricated using a facile one-pot solvothermal method. This heterojunction consists of homogeneous dispersed Bi4V2O11 nanocrystals anchored on the surface of Bi2MoO6 nanoflakes, endowing the heterojunction with nanosized interfacial contact. Based on the favorable interfacial contact, the band alignment at the heterojunction effectively facilitated photo-generated carrier transfer, which was verified by photoelectrochemical and photoluminescence measurements. Thereby, in contrast with pristine Bi2MoO6 and Bi4V2O11, the as-synthesized heterojunction with nanoscale contact exhibited significantly enhanced photocatalytic activity towards the degradation of MB and the reduction of Cr(VI). In addition, the as-fabricated Bi2MoO6/Bi4V2O11 heterojunction exhibited good cycling stability for MB degradation after 4 cycles. Finally, a plausible photocatalytic mechanism for MB degradation over the Bi2MoO6/Bi4V2O11 heterojunction was discussed in detail. This work not only reports a highly efficient photocatalyst but also sheds light on the design and optimization of a heterojunction.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Jinsong Liu,Yuanfeng Wu,Chen Wang,Zhongbao Sun,Danni Wu,Shengxiang Gao,Yubo Cheng,Haozhe Kang,Honglie Shen,Kongjun Zhu
In this paper, a Bi 2 MoO 6 /KNbO 3 photocatalyst with type-II heterojunction was designed and successfully prepared via a simple solvothermal method, and effect of loading amount of Bi 2 MoO 6 in the composite on the piezo-photocatalytic performance was studied in detail. The BMO/KN-3 composite loaded with 45 % Bi 2 MoO 6 showed the highest 90 % piezo-photocatalytic degradation efficiency of RhB under the synergistic effect of illumination and ultrasound, and the degradation efficiency can still remain above 81.5 % after 5 times of reused. The piezo-photodegradation efficiency of the BMO/KN-3 composite towards other pollutants such as MB, TC and CR also reached 76 %, 65 % and 97 % respectively. The free radical scavenging experiment confirmed that h⁺ plays a major role in the degradation process. Theoretical analysis suggests that the synergistic effect of type-II heterojunction construction and piezoelectric polarization under illumination in the Bi 2 MoO 6 /KNbO 3 composite greatly promotes the separation of photocarriers at the phase interface, thereby leading to excellent degradation characteristics.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Junhui Yi,Changquan Jiao,Huimei Mo,Qiujuan Chen,Qining She,Zhilin Li
Flower-like Bi 2 O 3 /Bi 2 MoO 6 heterostructured microspheres with excellent photocatalytic performance were successfully constructed by in situ ion exchange and calcination , employing Bi 2 MoO 6 microspheres prepared by solvothermal method as raw material and template. Various characterization techniques including XRD , FE-SEM, EDS , UV–vis DRS and XPS have been adopted to analyze the composition, structure and optical absorption property of the obtained sample. Their photocatalytic properties for degrading acid orange 7 (AO7) were investigated with visible light. Experimental results show that all Bi 2 O 3 /Bi 2 MoO 6 composites have a higher catalytic activities than pure Bi 2 MoO 6 . Remarkably, 0.2Bi 2 O 3 /Bi 2 MoO 6 show best activity and the degradation efficiency is up to 99% under visible light for 100 min, which is ascribed to the synergistic effect and big heterojunction interface, and promoting rapid transmission of photogenerated charge. Moreover, There is negligible reduction on the degradation efficiency after catalysts was reused for 4 times. The photogenerated holes (h + ) and superoxide radical anions (•O 2 - ) were major active species by radical scavenger experiments. A possible mechanism is proposed to explain rationally enhancement of photocatalytic activity.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Jiayu Gu,Mingzhou Wu,Linlin Wang,Fengling Liu,Suhao He,Minrui Ding,Yuye Yao,Neng Tao,Haitao Sha,Zhaobing Guo,Huimin Zhou,Pin Zhou,Pengxiang Qiu
Photocatalyst modification by energy level engineering is crucial for efficient free radical generation. Here, a novel strategy was employed to construct bromine-doped Bi 2 MoO 6 (BMO-Br) followed by an in-situ approach using Cetyltrimethylammonium bromide (CTAB) as the bromine (Br) precursor. The Br doping effectively modulated the energy band, increasing the oxygen vacancy concentration in Bi 2 MoO 6 . The modification significantly enhanced photoinduced charge separation and active free radical generation, leading to superior photocatalytic performance. The photocatalytic bacteriostatic and sulfamethazine (SM) degradation efficiency over BMO-Br-4 reached 100% and 70% within 60 min and 150 min, respectively. This work highlighted a facile yet effective strategy for tailoring the photocatalyst properties, demonstrating promising potential for various photocatalytic applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Huining Zhang,Zongqian Zhang,Yuling Tang,Jianping Han,Zhiguo Wu,Zhiqiang Wei,Shaofeng Wang,Yang Cao,Seng Zhang,Yue Zhang
This study focuses on a novel ternary heterojunction catalyst for the removal of 2,4-dichlorophenol (2,4-DCP), an organic pollutant that is difficult to degrade. An efficient CuInS 2 /BiOI/Bi 2 MoO 6 ternary heterojunction photocatalyst was formed by constructing a CuInS 2 /BiOI composite layer on a Bi 2 MoO 6 substrate using an in-situ growth technique. The microstructure and photoelectric conversion properties of the catalysts were comprehensively resolved by systematic material characterization, including scanning electron microscopy (SEM) observation, X-ray photoelectron spectroscopy (XPS) analysis and photoelectrochemical testing. The experimental results showed that the optimized catalyst at a loading of 2.0 g/L exhibited excellent photocatalytic degradation efficiency against 20 mg/L concentration of 2,4-DCP at neutral pH, reaching 80.3 % degradation rate in 120 min. This high performance was mainly attributed to the enhanced charge-carrier separation mechanism at the heterojunction interface, which effectively enhanced the utilization and transfer rate of photogenerated electron-hole pairs and enhanced the photocatalytic activity of the catalyst. In addition, the study also deeply explored the conversion pathway of elemental chlorine in the photocatalytic system, elucidated the mechanism of 2,4-DCP degradation and dechlorination, and provided a theoretical basis for further improving the environmental adaptability and dechlorination efficiency of the catalyst. Overall, the CuInS 2 /BiOI/Bi 2 MoO 6 ternary heterojunction photocatalysts proposed in this study demonstrate a broad application prospect in the purification of 2,4-DCP and other organic pollutants, and open up a new way to solve the problems of industrial wastewater treatment, which is of great environmental significance and scientific value.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Fang Zhu,Huiqi Wu,He Zhang,Sridhar Komarneni,Jianfeng Ma
Here in, a special catalytic system of potassium persulfate (K 2 S 2 O 8 , PS) activated by Bi 2 MoO 6 –CuS composite was established for the orange II (OII) degradation under visible light. The Bi 2 MoO 6 –CuS composite was synthesized by a two-step hydrothermal and solvothermal methods. The structure, morphology, light absorption and photocatalytic properties of the composite were respectively characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–visible diffuse reflectance spectroscopy (UV–vis DRS). The removal efficiency of OII degradation in the Bi 2 MoO 6 –CuS/PS/vis system reached to 98% within 80 min, which was much higher than that of either Bi 2 MoO 6 or CuS alone. A feasible mechanism analysis of OII degradation was proposed and validated by simple classical quenching experiments and electron spin resonance (ESR) spectroscopy. The high removal efficiency by the nanocomposite could be attributed to highly active species of O 2 ·- , ·OH and SO 4 •− radicals in the Bi 2 MoO 6 –CuS photocatalytic oxidation system. Moreover, the composite material retained its activation performance even after 5 degradation cycles, which suggested its high stability.
研究领域:
环境科学
·
催化材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）